The coelacanth is a kind of fish that has existed for 400 million years.

Image by Alberto Fernandez Fernandez, 2007.
Reproduced under the terms of the GNU Free Documentation License, Version 1.2

The modern day coelacanth is almost identical to its Paleozoic ancestors. How has the evolution of this species most likely progressed?
A.
It has experienced gene flow from a separate population which has drastically changed its genetic make-up.
B.
It has evolved convergently to fill a specific niche in its ecosystem.
C.
It has experienced long periods of stasis in which little change has occurred.
D.
It has changed gradually over time into a completely different species.

Answer:

Mitochondria

Explanation:

Answer:

pancreas

Explanation:

the pancreas is what releases insulin in the body

Pancreas' beta cells produce insulin in response to the blood's growing glucose levels. When blood glucose levels increase, the pancreas begins to secrete insulin.

Glucose from the blood can be absorbed by the cells in the muscles, fat, and liver because of insulin.

These cells use the glucose as fuel, or they can turn it into fat when they need it. Other metabolic processes, such the breakdown of fat or protein, are also impacted by insulin.

Glucose, a form of sugar, is lowered in the blood by the hormone insulin. When the blood glucose level rises, such as after eating, it is produced by the pancreatic beta cells and released into the blood.

Glucose can either be saved for later use or utilized as fuel in the body's cells with the assistance of insulin.

Therefore, Pancreas was producing too much insulin, causing low blood sugar. Pituitary gland adrenal gland gonads thyroid gland.

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Answer:

I did this question for a science quiz and the answer is variation trust me I doubled checked on my quiz.

Explanation

Birds of a species have different sized and shaped beaks. What is this an example of variation as it is the cause of natural selection.

The maximum genetic variant withinside the ALX1 gene is related to variant in beak form now no longer simplest among species of Darwin's finches however additionally amongst people of certainly considered one among them, the medium floor finch.

Now, researchers have nailed the genetics at the back of those iconic beak shapes. When the crew sequenced the genomes of one hundred twenty character birds, it determined a gene, ALX1, that varies among species with big or small, pointy beaks.

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Answer:

f years old, so their seedlings date back prior to the extinction of the dodo bird. The seeard and needed to pass through the digestive tract of the dodo bird before they would germinate. When there were no more dodo birds, no more young Calvaria trees germinated. The relationship between the=ird and the Tambalacoque tree is an example of

Explanation:

Mauritius Islands in the Indian Ocean. All of the trees appld, so their seedlings date back prior to the extinction of the dodo bird. The seeds of Calvar=eded to pass through the D

Answer:

metabolism

Explanation:ong

Transcription is best described as the production of proteins based on the cell's genetic information.

What is transcription?

Transcription is the process of turning a segment of DNA into RNA. DNA segments that have been translated into RNA molecules that can encode proteins are known as messenger RNA (mRNA). When extra DNA segments are translated into RNA molecules, non-coding RNAs are created (ncRNAs). Just 1% to 3% of all RNA samples contain mRNA. Human genome coding vs. non-coding DNA analysis reveals that while at least 80% of mammalian genomic DNA can be actively translated (in one or more types of cells), the majority of this 80% is non-coding RNA (ncRNA), while less than 2% of the mammalian genome can be actively translated into mRNA.

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Answer: Gene expression

Answer:

A

Explanation:

Type of bean plants used in the experiment

Answer:

The human body uses amino acids to make proteins to help the body: Break down food. Grow. Repair body tissue.

Explanation:

Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones. Protein is also important for growth and development in children, teens, and pregnant women.

Answer:

An organelle is a structure within the cytoplasm of a eukaryotic cell that is enclosed within a membrane and performs a specific job. Organelles are involved in many vital cell functions. Organelles in animal cells include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and vacuoles.A

Explanation:

The probabilities of the offspring's blood types are 25% for blood type A, 25% for blood type AB, and 50% for blood type O.

ABO blood grouping is a system used to classify human blood into different groups based on the presence or absence of antigens on the surface of red blood cells. There are four main blood types: A, B, AB, and O. The A and B antigens are glycoproteins that are present on the surface of red blood cells, while the O antigen is the absence of both A and B antigens.

To determine the probability of each offspring's blood type, we need to first understand the inheritance patterns of the ABO blood group system. The presence or absence of two antigens, A and B, on the surface of red blood cells determines the ABO blood group system.  The possible blood types are A, B, AB, and O. The inheritance of ABO blood types follows a codominant pattern, where both alleles are expressed equally.

Each person has two copies of the ABO gene, one inherited from each parent. Three alleles are conceivable: A, B, and O. O is recessive, while A and B are codominant. The IA allele codes for the A antigen, IB allele codes for the B antigen, and the i allele (recessive) does not produce either A or B antigens.

With that said, let's look at the parent's genotypes:

Parent 1: IA IB DD

Parent 2: IAIA Dd.

The possible offspring blood types and their probabilities are:

IAIA (25%): blood type A (homozygous for the A allele)

IAi  (25%): blood type A (heterozygous for the A allele)

IAIDd (25%): blood type AB (heterozygous for both A and B alleles)

iDd  (25%): blood type O (homozygous for the i allele)

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During protein synthesis, the charged initiator tRNA binds at the P site.

Protein synthesis refers to the formation of new proteins through the process of translation. Translation occurs in the ribosomes and involves the synthesis of proteins from mRNA. The mRNA codons are read by the ribosomes and paired with the corresponding tRNA anticodons. The tRNA molecules are charged with amino acids, and when they bind to the ribosome, they donate their amino acids to the growing protein chain.

During translation, the initiator tRNA molecule recognizes the start codon on the mRNA and binds to the P site of the ribosome. This is the first step in the formation of the new protein. The A site of the ribosome is where the next incoming charged tRNA molecule binds to the ribosome. This tRNA molecule brings the next amino acid in the protein sequence.

The E site of the ribosome is where the tRNA molecules exit the ribosome after donating their amino acids to the growing protein chain. The T site is not directly involved in protein synthesis but is where uncharged tRNA molecules wait to be recharged with amino acids.
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Fossils appear in the strata in a specific order based on age. The correct option is D

Principle of faunal succession states that fossils appear in rock strata in a specific, predictable order based on the relative ages of the rock layers and the evolutionary relationships of the organisms represented by the fossils.

This principle allows geologists to use the relative ages of rocks and fossils to determine the relative age of other rocks and fossils in the same area and to establish a relative time scale for geologic events.

Therefore, By comparing the sequence of fossils in different rock strata, geologists can determine which strata are younger and which are older, and thus build a chronological framework for the Earth's history.

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The amount of gas measured in a setup is an estimate of the ATP produced because gases are subject to various physical and environmental conditions that can affect their volume and behavior.

Gases are highly sensitive to temperature, pressure, humidity, and other factors, which can cause them to expand or contract.

Moreover, the process of measuring gas production involves several steps that can introduce errors, such as fluctuations in temperature or pressure, inaccuracies in measurement instruments, or the presence of other gases that can interfere with the measurement.

To make the setup more accurate, one can take several steps, such as:

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The most effective strategy to allow lobster populations to increase is to implement a combination of conservation measures, such as size limits, catch limits, and seasonal closures.

1. Size limits: Enforce minimum and maximum size limits for lobsters caught. This ensures that juvenile lobsters have the chance to mature and reproduce before being harvested, and larger lobsters can continue to contribute to the gene pool.

2. Catch limits: Implement a quota system that restricts the total number of lobsters that can be caught by each fisher or fishing vessel within a specific time frame. This helps control the overall fishing pressure on the lobster population.

3. Seasonal closures: Temporarily close certain areas of the fishery during critical breeding and molting periods to allow lobsters to reproduce and grow without being disturbed by fishing activities.

By incorporating these strategies in managing the lobster fishery, you can effectively promote the growth and recovery of declining lobster populations, ensuring long-term sustainability and a healthy ecosystem.

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Answer:

c    make the data more valid

Explanation:

Answer:

1.  Diffusion

2. Osmosis

3. Diffusion

4. Facilitated Diffusion

5. Osmosis

6. Diffusion

Explanation:

Facilitated Diffusion- Move molecules across the cell membrane in a passive transportation with  membrane protein.

Osmosis- Move water molecules from high concentration to low concentration.

Diffusion- Evenly spread molecules from high concentration to low concentration.

1. Gases move across the room with ease without energy.

2. Water enter skin cells allowing cells to grow and wrinkle without energy.

3. Gases move with ease without energy.

4. Glucose requires energy to transfer.

5. Water leaves throat when concentration outside of throat is less that that inside the trough so water moves outwards.

6. Oxygen is uses passive diffusion does not require energy and will with ease move in and through a cell.

Answer:

The PH at which an enzyme will function best is;

In the optimal range

Explanation:

Every enzyme has an optimal pH value which is specific for the enzyme, and where their maximum activity of the  enzyme is observed, which is known as its optimal pH

When the enzyme is placed in a different pH, the enzyme activity is observed to be diminishing until the effect of the enzyme stops

This is so because, as the pH of the environment changes, the shape of the active site on the substrate to which the enzyme binds to have an effect changes and the enzyme is no longer able to effectively interact with the substrate

The enzymes in the stomach work best in the acidic environment of the stomach and have an optimal pH of 2, while the enzymes of the small intestine have an optimal pH of 7.5

Answer: b

Explanation:

I believe there are 6 carbon atoms in one molecule of glucose

Answer:

6

Explanation:

The chemical formula for glucose is C6H12O6

Answer:

i) Rusting occurs the least in tubes 2 and 3 because either of air and water which are necessary for rusting is absent in the two tubes respectively.

ii) Rusting occurs most in tube 1 because both air and water which are necessary for rusting are present.

Explanation:

Rusting is a chemical change which involves a redox reaction. During the process of rusting, metallic iron is oxidized to hydrated iron (iii) oxide by oxygen present in air.

For rusting to take place effectively, each of these three factors mist be available: metallic iron, oxygen and water.

In the figure above, the iron nails in the three tester tubes will rust to different extents based on the availability of the three factors.

In test tube 1, the iron nails will rust the most because all the three factors: metallic iron, oxygen present in air, and water are abundantly present.

In test tube 2, the iron nails will rust the least or not at all because boiling of water removes dissolved oxygen from water and the oil layer above the boiled water prevents entry of oxygen from air. Thus, the nail do not rust because one of the three factors for rusting to take place, in this instance, oxygen is absent.

In test tube 3, the iron nails rusts the least or not at all as well because moisture or water is absent. Calcium chloride, a drying agent removes all the moisture from inside the tube. Hence, even though air is present, rusting do not occur as there is no moisture or water present.

Decreasing extracellular calcium can inhibit the opening of voltage-gated calcium channels on the presynaptic axon terminal, which is necessary for the proper functioning of synaptic transmission.

Voltage-gated calcium channels are located on the presynaptic axon terminal and are responsible for the influx of calcium ions into the cell in response to an action potential. This influx of calcium ions triggers the fusion of secretory vesicles with the presynaptic plasma membrane and the subsequent release of neurotransmitters into the synaptic cleft.

However, if extracellular calcium is greatly decreased, there will be a decrease in the concentration gradient of calcium ions between the extracellular and intracellular environments. This will make it more difficult for calcium ions to enter the cell through the voltage-gated calcium channels, and may prevent the necessary influx of calcium ions required for the fusion of secretory vesicles with the plasma membrane and the subsequent release of neurotransmitters.

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Answer:

Explanation:

organism that can make their own food using energy of sun are called autotroph and producers

Organisms that can make their own food using the energy of the sun are called autotrophs.

Autotrophs are capable of converting inorganic substances, such as carbon dioxide and water, into organic compounds, typically through the process of photosynthesis. They utilize the energy from sunlight to drive the synthesis of glucose or other energy-rich molecules, which serve as their source of nutrition.

Plants are the most well-known examples of autotrophs, as they possess specialized structures, such as chloroplasts containing chlorophyll, which enable them to capture sunlight and carry out photosynthesis. During photosynthesis, plants convert light energy into chemical energy, storing it in the form of carbohydrates, which can be used for growth, metabolism, and reproduction.

In addition to plants, certain types of bacteria, algae, and some protists are also capable of photosynthesis and are considered autotrophs. Autotrophs play a crucial role in ecosystems as they form the basis of food chains, serving as a source of energy for heterotrophic organisms that cannot produce their own food.

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The societal ecological or technical constraint and the way that resource managers would considered before proposing solutions are given below.

Social characteristics and behaviors that influence a project's viability among a public are referred to as social constraints. Before offering a solution, a resource manager should take into account social restrictions, which include official practices like government regulations as well as informal norms like cultural preferences.

Technical limitations are rigid design choices made at the technical level that cannot be changed. Technical limitations are typically introduced by the plan's early stakeholders.

Before recommending a solution, a resource manager should take into account technological limitations such the operating system and framework, platforms supported, and programming languages required for various reasons.

Lastly, Environmental restrictions have the biggest impact on businesses. Before suggesting a solution, a resource manager should take into account ecological restrictions such social expectations and requirements, competitor behavior, regulatory requirements, change in company, and modification in technology. Environmental restrictions are crucial to the firm that needs to plan ahead.

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The pharmacologic agents that have phototoxicity as a side effect are Doxycycline, hydrochlorothiazide, and naproxen.

Phototoxicity is the common side effect of some pharmacologic agents. They are common drugs that are used for different treatments. Doxycycline is a type of antibiotic that can cause skin to become very sensitive to sunlight. Hydrochlorothiazide is a diuretic that is used to reduce fluid buildup in the body and treat high blood pressure, but it can cause skin sensitivity to the sun. Naproxen is a type of nonsteroidal anti-inflammatory drug (NSAID) that can cause sensitivity to sunlight. A phototoxic reaction is obtained when topical and systemic drugs or their metabolites absorb light inducing a direct cellular damage, while a photoallergic reaction takes place when the interaction between drugs and ultraviolet radiations causes an immune cutaneous response. Phototoxicity is a form of skin damage caused by exposure to light when taking certain drugs. Sunburn, stinging, and even blistering are all possible symptoms. The severity of phototoxicity can range from mild to severe and can last for days.

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Answer:

B

Explanation:

Because of how an individual will respond

Keeping in mind the recent evidence indicating charophytes are the sister group to land plants, we can infer alternation of generations likely evolved independently in land plants as well as in red and brown algae.

Correct option is D.

Recent evidence indicates that charophytes, also known as stoneworts, are the sister group to land plants. However, contrary to other algal groups such as red, brown, and green algae, charophytes do not exhibit alternation of generations. This implies that if charophytes and land plants are related, then alternation of generations likely evolved independently in both groups.

Although it is unclear whether or not land plants evolved directly from any kind of alga, if this hypothesis is correct, it follows that alternation of generations must have been beneficial in both lineages, as observed in their presence in both extant groups. It is possible that alternation of generations may have re-evolved in charophytes or their descendants, though this remains to be tested.

Correct option is D.

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